https://github.com/sea-boat/mysql-protocol
mysql客户端通过statistics命令查询服务端内部统计。
| 类型 | 名字 | 描述 |
|---|---|---|
| int<3> | payload长度 | 按照the least significant byte first存储，3个字节的payload和1个字节的序列号组合成报文头 |
| int<1> | 序列号 | |
| string | payload | 报文体，长度即为前面指定的payload长度 |
Payload
1 [09] COM_STATISTICS
更多详情 ： http://dev.mysql.com/doc/internals/en/com-statistics.html
/**
*
* <pre><b>statistics command packet.</b></pre>
* @author
* <pre>seaboat</pre>
* <pre><b>email: </b>849586227@qq.com</pre>
* <pre><b>blog: </b>http://www.gxlcms.com/;/pre>
* @version 1.0
* @see http://www.gxlcms.com/
*/public class StatisticsPacket extends MySQLPacket {
public byte payload;
@Override
public int calcPacketSize() {
return 1;
}
@Override
protected String getPacketInfo() {
return "MySQL Statistics Packet";
}
@Override
public void read(byte[] data) {
MySQLMessage mm = new MySQLMessage(data);
packetLength = mm.readUB3();
packetId = mm.read();
payload = mm.read();
} @Override
public void write(ByteBuffer buffer) {
int size = calcPacketSize();
BufferUtil.writeUB3(buffer, size);
buffer.put(packetId);
buffer.put(COM_STATISTICS);
}
}